package com.sky.service.impl;


import com.sky.context.BaseContext;
import com.sky.dto.ShoppingCartDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.ShoppingCart;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.mapper.ShoppingCartMapper;
import com.sky.service.ShoppingCartService;
import lombok.extern.slf4j.Slf4j;
import org.apache.ibatis.annotations.Select;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.List;

@Service
@Slf4j
public class ShoppingCartServiceimpl implements ShoppingCartService {

@Autowired
private ShoppingCartMapper shoppingCartMapper;
@Autowired
private DishMapper dishMapper;
@Autowired
private SetmealMapper setmealMapper;

    /**
     * 添加购物车
     * @param shoppingCartDTO
     */

    public void addShoppingCart(ShoppingCartDTO shoppingCartDTO) {
        ShoppingCart shoppingCart=new ShoppingCart();
        BeanUtils.copyProperties(shoppingCartDTO,shoppingCart);
        //设置购物车id，只能查询自己的购物数据
        shoppingCart.setUserId(BaseContext.getCurrentId());
        //检测购物车
        List<ShoppingCart> shoppingCartList=shoppingCartMapper.list(shoppingCart);
        if(shoppingCartList!=null&&shoppingCartList.size()==1){
            shoppingCart=shoppingCartList.get(0);
            shoppingCart.setNumber(shoppingCart.getNumber()+1);
            shoppingCartMapper.updateNumberById(shoppingCart);
        }
        else{
            //不存在就添加
            Long dishId=shoppingCart.getDishId();
            if(dishId!=null) {//添加的是菜品
                Dish dish=dishMapper.getById(dishId);
                shoppingCart.setName(dish.getName());
                shoppingCart.setImage(dish.getImage());
                shoppingCart.setAmount(dish.getPrice());
            }
            else{//不是菜品，是套餐

                Setmeal setmeal=setmealMapper.getById(shoppingCartDTO.getSetmealId());
                shoppingCart.setName(setmeal.getName());
                shoppingCart.setImage(setmeal.getImage());
                shoppingCart.setAmount(setmeal.getPrice());
            }
            shoppingCart.setNumber(1);
            shoppingCart.setCreateTime(LocalDateTime.now());
            shoppingCartMapper.insert(shoppingCart);
        }
    }

    /**
     * 查看购物车
     * @return
     */

    public List<ShoppingCart> showShoppingCart() {
        ShoppingCart shoppingCart=ShoppingCart.builder()
                .userId(BaseContext.getCurrentId())
                .build();
        return shoppingCartMapper.list(shoppingCart);

    }

    /**
     * 清空购物车
     */
    public void cleanShoppingCart() {
        shoppingCartMapper.deleteByUserId(BaseContext.getCurrentId());

    }


    public void subShoppingCart(ShoppingCartDTO shoppingCartDTO) {
   ShoppingCart shoppingCart=new ShoppingCart();
   BeanUtils.copyProperties(shoppingCartDTO,shoppingCart);
   shoppingCart.setUserId(BaseContext.getCurrentId());
   List<ShoppingCart> list=shoppingCartMapper.list(shoppingCart);
   if(list!=null&&list.size()>0){
       shoppingCart=list.get(0);
       Integer number=shoppingCart.getNumber();
       if(number==1){
           shoppingCartMapper.deleteById(shoppingCart.getId());
       }
       else{
           shoppingCart.setNumber(shoppingCart.getNumber()-1);
           shoppingCartMapper.updateNumberById(shoppingCart);
       }
   }
    }
}
